You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• Shoe of Bounty

  Increase dodge rate and critical rate by 4%.
• Steel Frame Tail
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Scroll: Red Curse seal
• Shadow Twin Blades
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• S83 Four Wings

  Increase dodge rate by 8%.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Wooden Hammer
• Egg Hunter Basket

  Increase 6% accuracy. (Easter 2011 Limited Edition)
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Dark World Hammer
• Scroll: Fire and Earth
• Decorate Battle Umbrella
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Senior Kari Bagpack

  Reduce 3% damage taken.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.